[TASK] Add missing flag english (US+UK) for sys_language record

Resolves: #29531
Releases: master
Change-Id: Ia1e800c8fe24fc53ea959549c9d707b949cf0aa2
Reviewed-on: http://review.typo3.org/43561


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>